It is not the first time she has worn clothes from the popular shop. She once wore a $10 (£6) Gap t-shirt for lunch with Nancy Reagan. She also wore a $34.95 (£21) H&M dress on The Today Show, and also was seen in a Merona frock (sold at Target stores) two years ago.

Mrs Obama is taking part in a trend for thrifty shopping that has also reached British shores. The Duchess of Cambridge is also known for her love of high-street fashion, especially the chains Whistles and Zara.